Its all in your AIP Enroute...all you need to know about LAHSO...I tried opening it on the CASA website but my ADOBE is not up to it...might be because I use a MAC instead of a PC.
LAHSO is not open slather...there are specific procedures which must be followed. Things like it is a dependant procedure, it will be mentioned on the ATIS, specific read back requirements, pilot advice of LAHSO approvals, undertsnding of the distance to run markers...etc...all headings under which fascinating info lives in your AIP ENR section.